
Photo: (c) Johannes S., some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Paradoxornis gularis
Habitat
Subtropical or tropical moist montane forests
Range
Eastern Asia from the Himalayas to Indochina and Hainan
The grey-headed parrotbill is a bird of the family Paradoxornithidae found in eastern Asia from the Himalayas to Indochina and Hainan. Its natural habitat is subtropical or tropical moist montane forest (Wikipedia, general species account).
That short account is the only source read for the Bhutan guide. It does not name Bhutan specifically, and gives no plumage, size, diet or breeding information, so none is stated.